The drivers manual for my new 2013 es350 with the nav package (page 859) says you can go into main menu then select "service" then "vehicle" then "vehicle customization" and change the number of times you can change the turn singal flashing from 3 (factory default) to 5 or 7 flashes when just changing lanes. Turns out being able to change the number of flashes can only be controled by the dealer rather than by the owner even though the book says you can do it. Why would that be a dealer controled option?? Dealer didn't know why the book says you can make change but they were able to hook up their computer and make the required change...perhaps drivers manual is wrong or some Lexus software download was made after I bought the car..can they do that??

Odd thing is when I first bought bought the car and was scrolling through all the menu screens I was able to access the flasher signal change screen and when I went back a few days later to make a change the option to do so was gone.

The drivers manual for my new 2013 es350 with the nav package (page 859) says you can go into main menu then select "service" then "vehicle" then "vehicle customization" and change the number of times you change the turn singal flashing from 3 (factory default) to 5 or 7 when just changing lanes. Turns out being able to change the number of flashes can only be controled by the dealer rather than by the owner even though the book says you can do it. Why would that be a dealer controled option?? Dealer didn't know why the book says you can make change but they were able to hook up their computer and make the required change...perhaps drivers manual is wrong or some Lexus software download was made after I bought the car..can they do that??

Odd thing is when I first bought bought the car and was scrolling through all the menu screens I was able to access the flasher signal change screen and when I went back a few days later to make a change the option to do so was gone.

Any comment or thoughts

There was talk early about this and the 5 or 7 option.
However,it's not listed in the GS owners manual vehicle customization by consumer or dealer service either.
Probably not adjustable but though I'd prefer a 5 count,I'm still happy with the 3 blinks.

I too am seeking a modification to the "5" flash lane change feature as well as the keyfob controlled window/sunroof retraction. Stopped by the dealership late in the day to request assistance; they confirmed it is a technician function that requires a brief hookup in the shop. Unfortunately they could not accomodate me that day but suggested anytime before noon would be satisfactory without an appointment.

Eagleguy, I too believe the lane change feature was present in the menu shortly after delivery!

The drivers manual for my new 2013 es350 with the nav package (page 859) says you can go into main menu then select "service" then "vehicle" then "vehicle customization" and change the number of times you can change the turn singal flashing from 3 (factory default) to 5 or 7 flashes when just changing lanes. Turns out being able to change the number of flashes can only be controled by the dealer rather than by the owner even though the book says you can do it. Why would that be a dealer controled option?? Dealer didn't know why the book says you can make change but they were able to hook up their computer and make the required change...perhaps drivers manual is wrong or some Lexus software download was made after I bought the car..can they do that??

Odd thing is when I first bought bought the car and was scrolling through all the menu screens I was able to access the flasher signal change screen and when I went back a few days later to make a change the option to do so was gone.

Any comment or thoughts

My '13 GS was unable to do it, but my LS and LX is able to do this easily.

It is possible to do this from inside your car it doesn't matter if you have navigation or not.the only car you can do it in as of right now is the 2013 GS because you have to use the windshield wiper stock and headlight stock to change it . Email me if you would like to know how tunderwood@brumos.com and I will email you the instructions.

It is possible to do this from inside your car it doesn't matter if you have navigation or not.the only car you can do it in as of right now is the 2013 GS because you have to use the windshield wiper stock and headlight stock to change it . Email me if you would like to know how tunderwood@brumos.com and I will email you the instructions.

This is confusing. I saw the procedure in the 4GS forum, but wasn't sure it could be applied to our ES's. Your statement claims it is both possible and not possible on the ES.